import java.util.Scanner;

public class V {
    /* public static void main(String[] args) {
         int a = 5;
         int b=2;
         System.out.printf("C:%d\n",a*2+b*2);
         System.out.printf("S:%d",a*b);
     */
    public static void main(String[] args) {
       /*float r=0.2f;
       System.out.printf("S:%.2f",3.14*r*r);
       System.out.printf("%3d%3d%3d\n",1,3,5);
       System.out.printf("%3d%3d%3d\n",7,9,11);
       System.out.printf("%3d%3d%3d\n",13,15,17);
        */

      /* System.out.printf("%7s%7s%7s\n","姓名","学号","成绩");
       System.out.printf("%7s%10d%7d\n","1号",10086,86);
       System.out.printf("%7s%10d%7d\n","2号",2222,100);
       */
      /* int length;
       int width;
       int C,S;
       System.out.println("length:");
       Scanner sc=new Scanner(System.in);
       System.out.println("width:");
       length= sc.nextInt();
       width= sc.nextInt();
       C=(length+width)*2;
       S=length*width;
       System.out.printf("C:%d\nS:%d\n",C,S);
       sc.close();
       */
       /*Scanner sc=new Scanner(System.in);
       System.out.println("输入r:");
       double r= sc.nextDouble();
       double PI=3.14;
       double S=PI*r*r;
       System.out.printf("S:%.2f",S);
        */
        /*Scanner sc = new Scanner(System.in);
        System.out.println("请输入数字");
        int num = sc.nextInt();
        if (num < 100 || num > 999) {
            System.out.println("不是3位数");
        } else {
            int hundres = num / 100;
            int shiwei=(num%100)/10;
            int gewei=num%10;
            int lastnumber=gewei*100+shiwei*10+hundres;
            System.out.println("结果："+lastnumber);
            sc.close();
         */
        /*Scanner sc=new Scanner(System.in);
        System.out.println("请输入成绩：");
        int score= sc.nextInt();
        if (score>=60){
            System.out.println("及格");
        }
        else {
            System.out.println("不及格");
         */
        /*System.out.println("输入num:");
       Scanner sc=new Scanner(System.in);
       int num= sc.nextInt();
       if (num>0){
           System.out.println("num为正数");
       } else if (num<0) {
           System.out.println("num为负数");
       }
       else {
            System.out.println("num为0");
         */
        /*System.out.println("输入星期数：");
        Scanner sc=new Scanner(System.in);
        int week= sc.nextInt();
        switch (week) {
            case 1:
                System.out.println("周一");
                break;
            case 2:
                System.out.println("周二");
                break;
            default:
                System.out.println("周末");
         */
        /*System.out.println("选择:");
        Scanner sc=new Scanner(System.in);
        int peopel= sc.nextInt();
        switch (peopel){
            case 1:
                System.out.println("1号");
                break;
            case 2:
                System.out.println("2号");
                break;
            case 3:
                System.out.println("3号");
                break;
            default:
                System.out.println("4号");
         */

        }
        }



